摘要：

Electrokinetic (EK) remediation coupled with permeable reactive barriers (PRB) of zero-valent iron (ZVI) was applied for treating a Cr contaminated soil. Results show that loading ZVI-PRBs in different locations of soil column strongly affected the EK performance. Transport of Cr in the soil column was resulted from the balance of its electromigration and electroosmosis (EO). With increasing treatment time, the total Cr concentration of the soil column pore-water decreased in all the treatments. The lowest Cr concentration of the pore-water decreased to only 0.03mg L1 after a run for 384h, and a maximum 71.5% of initial soil Cr(VI) was removed when two ZVI-PRBs were loaded at the two ends of the soil column. Additionally, the soil EC values were lower than the original one after the EK-PRB treatments, suggesting that these treatments did not introduce more ions into the soil.

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